Image display device

Abstract

A gradation potential generating circuit ( 24 ) in a color liquid crystal display device includes 65 resistance elements connected in series and dividing a voltage applied between first and second nodes to generate 64 gradation potentials; a first current amplifier circuit provided corresponding to each gradation potential higher than a precharge potential of a data line and having charging capability higher than discharging capability; and a second current amplifier circuit provided corresponding to each gradation potential lower than the precharge potential and having discharging capability higher than charging capability.

1 . An image display device displaying an image in accordance with an image signal, comprising: 
 a plurality of pixel display elements arranged in a plurality of rows and columns and each performing gradation display in accordance with an applied gradation potential;    a plurality of scanning lines provided corresponding to said plurality of rows respectively;    a plurality of data lines provided corresponding to said plurality of columns respectively;    a vertical scanning circuit successively selecting a scanning line from said plurality of scanning lines for a prescribed time period and activating each pixel display element corresponding to the selected scanning line; and    a horizontal scanning circuit providing a gradation potential to each pixel display element activated by said vertical scanning circuit in accordance with said image signal; wherein    said horizontal scanning circuit includes    a precharge circuit setting each data line to a predetermined precharge potential,    a potential generating circuit generating a plurality of gradation potentials different from one another,    a first current amplifier circuit provided corresponding to each gradation potential higher than said precharge potential among said plurality of gradation potentials, outputting a potential equal to the corresponding gradation potential, and having charging capability higher than discharging capability,    a second current amplifier circuit provided corresponding to each gradation potential lower than said precharge potential among said plurality of gradation potentials, outputting a potential equal to the corresponding gradation potential, and having discharging capability higher than charging capability, and    a selection circuit selecting one gradation potential out of said plurality of gradation potentials in accordance with said image signal and providing an output potential of said first or second current amplifier circuit corresponding to the selected gradation potential to each activated pixel display element through each data line.    
   
   
       2 - 17 . (canceled)  
   
   
       18 . The image display device according to  claim 1 , wherein 
 said horizontal scanning circuit further includes an offset compensation circuit provided corresponding to each of said first and second current amplifier circuits, detecting an offset voltage in the corresponding current amplifier circuit, and canceling the offset voltage in the corresponding current amplifier circuit based on a detection result.    
   
   
       19 - 20 . (canceled)